Abstract
We present 1-7 GHz high-resolution radio imaging (VLA and e-MERLIN) and spatially resolved ionized gas kinematics for 10 z < 0.2 type 2 'obscured' quasars (log [LAGN/erg s(-1)] greater than or similar to 45) with moderate radio luminosities (log[L-1.4 GHz/W Hz(-1)] = 23.3-24.4). These targets were selected to have known ionized outflows based on broad [O III] emission-line components (full width at half-maximum approximate to 800-1800 km s(-1)). Although 'radio-quiet' and not 'radioAGN' by many traditional criteria, we show that for nine of the targets, star formation likely accounts for less than or similar to 10 per cent of the radio emission. We find that similar to 80-90 per cent of these nine targets exhibit extended radio structures on 1-25 kpc scales. The quasars' radiomorphologies, spectral indices, and position on the radio size-luminosity relationship reveals that these sources are consistent with being low power compact radio galaxies. Therefore, we favour radio jets as dominating the radio emission in the majority of these quasars. The radio jets we observe are associated with morphologically and kinematically distinct features in the ionized gas, such as increased turbulence and outflowing bubbles, revealing jet-gas interaction on galactic scales. Importantly, such conclusions could not have been drawn from current low-resolution radio surveys such as FIRST. Our observations support a scenario where compact radio jets, with modest radio luminosities, are a crucial feedback mechanism for massive galaxies during a quasar phase.
| Dokumententyp: | Zeitschriftenartikel |
|---|---|
| Fakultät: | Physik |
| Themengebiete: | 500 Naturwissenschaften und Mathematik > 530 Physik |
| ISSN: | 0035-8711 |
| Sprache: | Englisch |
| Dokumenten ID: | 82843 |
| Datum der Veröffentlichung auf Open Access LMU: | 15. Dez. 2021, 15:03 |
| Letzte Änderungen: | 15. Dez. 2021, 15:03 |
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